ABSTRACTS OF PAPERS 95 



north of the Cdbequids and of its equivalent, the Carboniferous conglomerate, 

 south of the Cobequids, along the axis of Minas Basin. 



At the close of deposition, with a slight disturbance in the Permian, a pene- 

 plain was developed in the Fund.\- region, and on the surface of this peneplain 

 the Tria.ssic sediments were laid in a shallow geosyncline. Block tilting and 

 faulting closed the Newark stage and changed the geosyncline into a region of 

 erosion. During the long period of erosion two peneplains have probably been 

 developed and uplifted by middle and late Tertiary time. 



Presented in full extemporaneously. 

 Eeraarks were made by Di'. W. C. Alden. 



The section adjourned. 



TITLES AXD ABSTRACTS OF PAPERS PRESENTED BEFORE THE SECOND SECTION 



On the conclusion of the presidential address of the Paleontological 

 Society, at 3.30 o'clock p. m., the reading of papers of Group B was com- 

 menced, with Vice-President Van Ingen of the Paleontological Society 

 presiding. 



ALEXANDRIAy ROCKS OF NORTHEASTERN ILLINOIS AND EASTERN 



WISCONSIN 



BY T. E. SAVAGE 



(Abstract) 



The early [Silurian strata in northeastern Illinois and eastern 'Wisconsin 

 were described and their fossils listed and discussed. The so-called "Clinton 

 Ir(jn ore" bed was shown to belong in the Ordovician system as the upper 

 member of the Ma(iuoketa of this region. The lower part of the Mayville 

 limestone of Wisconsin contains an Edgewood fauna and is considered the 

 e(iui\ak'iit in time of the Kdgewood formation of Illinois and Missouri. The 

 upper strata of the Mayville limestone furnished fossils characteristic of the 

 fiexton Creek (Bra.ssfield) limestone of Illinois and are regarded as repre- 

 senting a nortliward extension of that foi'iuation. 



liead in lull from manuscript. 



Tiie paper was discussed by Messrs. TTIrich and Oi-abau, with re])ly by 

 the author. 



OLENTANGY SHALE AND ASSOCIATED DEPOSITS OF NORTHERN OHIO 



BY CLINTON R. STAUFFER 



(Ahfilnict) 



A recent study of the section and fossils of the Olentangy shale to tiie south 

 and east of Sandusky, Ohio, indicates that it represents tlie lnwer part of tiie 

 Hamilton i)eds of Ontario. Tlie I'rout limestone, whicli lies immediately be- 



